Abstract
The primary purpose was to collect information on the condition of lighting equipment, rearview mirrors, and tyres on a nation wide sample of vehicles, and tyres on a nation wide sample of vehicles in use. Results show that headlamps are often badly out of aim. Rearview mirrors were generally in good physical condition. About 90% of the tyres in the sample were found to be free of defects. Literature surveys were also run on aerodynamic effects, equipment for cleaning headlamps and maintaining their aim under different loading conditions.